Lock-fold attachment for cornice-brakes



9.0.KEBNB. LOOK FOLD ATTACHMENT FOR OORNIGE BRAKES. No. 601,308.

(No Model.)

Patented Mar. 29,1898.

- gage the under side of the platen O, a footcitizen of the United States, residing at Cinparticularly pointed out in the claims.

UNITED STATES I PATENT OFFI E.

GEORGE O. KEENE,'OF CINCINNATI, OHIO.

LOCK-FOLD ATTACHMENT FQR CORNlCE-BRAKES.

SPECIFICATION forming part of Letters Patent No. 601,303, dated March 29, 1898.

Application'filed August 7. 1897 To all uihom it'may concern:

Be it known that I, GEORGE O. KEENE, a

cinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Lock- Fold Attachment for Cornice Brakes, of which the following is a specification.

My invention relates more particularly to a supplemental lock-fold-formin g attachment for use in connection with any of the wellknown cornice-brakes, but preferably in connection with the cornice-brakes patented by me July 1, 1884, No. 301,128,and May 10, 1887,. No. 362,749; and it consists in the novel feature of construction and combinationofparts, such as are hereinafter fully described, and

In the accompanyingdrawings, Figure 1 is a transverse sectional elevation of a cornicebrake embodying my invention, taken on line a: 00 of Fig. 2 and showing a sheet of metal placed therein with the clamping-jaws open undergoing the lock-fold-forming operation; Fig. 2, a broken plan'view of the movable platen or lower clamping-beam, showing my lock-fold-former devices thereon, the latter being also broken off, but showing sufficient for the purpose hereof; Fig. 3, an end view' of the lock-fold-former gage-shaft, showing the eccentrically-arranged pin thereon, which constitutes its bearing, one being provided at each end 'ofsaid gage-shaft; Fig. 4:, an end View of a sheet of metal, showing a double lock-fold at either side, the result of an op-. eration in my machine; and Fig. 5, a view similar to Fig. 4, but showing a sheet having a single lock-fold at either side. i

A represents the supporting-frame leg at one end of the machine; B, the upper clampin g or stationary tie-beam; C, the lower clampin g or movable platen or beam,and D the bending-apron, journaling at its opposite axial ends 01 in (boxes a on said platen.

E represents one of the several vertical push-bars whose lower ends pivotally engage the horizontal foot-shaft F at the base of the machine and Whose upper ends pivotally en lever or treadle G being attached to the shaft F to operate it and the said platen. Spiral spring I) is stretched between treadle G and an arm I) on the top of the frame-leg A to Serial No. 647,430. (No model.)

augment the rising of the foot-treadle and .the automatic opening of the clamping-jaws.

0 are provided with upturned projections 0, *(best seen in Fig. 1,) whose inner edges lie in a perpendicular line with the outer edge of the bending-apron, and the inner ends of said arins c are secured to forks on collars c ,which are in turn loosely mounted at suitable dis-- tances apart on the shaft d, the latter having eccentrically-disposed pins or journals e constructed at its opposite ends, (best seen in Fig. 3,) which bear in bracket-boxes e, projecting rearwardly from the platen near its opposite ends. (Best seen in Fig. 2.)

J is an are or segmental arm attached tothe platen O and projecting rearwardly from the latter near. one end thereof. This are is providedwith a graduated series of openings or holes j for the reception of astop or pin j, which is removably placed in either hole to suit the different widths of folds in the sheets operated upon.

A forked hand-lever K is attached to the eccentric at one end of shaft (1, adjacent the bearing-bracket e, and straddles the arc J for stop engagement withv the pin j. This hand-lever enables the operator to longitudinallymove the gage-arms c to suit the different widths of folds to be made in the metal sheets.

In the operation of my special attachment the gage-arms c are simultaneously set (to suit the desired width of fold) by means of the handle K. Then a metal sheets is laid thereon from the rear, with its fore edge resting against the upturned ends 0' of said gagearms. Then the foot-treadle is lowered so as to raise the platen O and thus firmly close the clamping-jaws (comprising said platen and the tie-beam B) on said sheet. Then the bending-apron is raised or turned on its axes Y by-means of hand-lever I till the single bend or fold sis made in the edge of the sheet.

Then the foot-pressure is removed from the treadlc, which permits the automatic opening of the clamping-jaws and the release of said sheet. The sheet passes through the same movements for the fold along the other edge.

If it is desired to make a double fold s in the edges of the sheet, as seen in the finished sheet, Fig. 4, the single-fold edge is inserted up to the upturned ends 0 of the gage-arms, as seen in Fig. 1. Then the clamping-jaws are closed and the same movements repeated as in making the single fold.

My lock-fold attachment is very simple and effective and readily applied to a cornicebrake or removed therefrom without affecting the machine for other work.

I claim- 1. The combination with a cornice-brake comprising a pair of clamping jaws or beams, mounted on a suitable frame, and a bendingapron journaled on one of said jaws, of a lock fold-forming attachment or gage device composed of a longitudinal shaft eecentrically mounted at its opposite ends in bearings on the platen or moving jaw-beam, a series of gage-arms projecting laterally from the said shaft over said platen and having upturned outer ends against which the sheet is placed for the fold-forming operation, and suitable means for actuating said shaft to suit different widths of lock-folds to be made in the sheets, substantially as herein set forth.

2. The combination with a cornice-brake comprising a pair of clamping-jaws mounted on a suitable frame, and a bending-apron journaled on one of said jaws, of an adjustable loek-fold-formin g attachment or gage device composed of a longitudinal shaft eccentrically mounted at its opposite ends in bearing-brackets on the platen or moving jawbeam, a series of gage-arms projecting laterally and forwardly from said shaft over said platen and having upturned outer ends against which the sheet is placed for the foldforming operation, a hand-lever on said shaft, and an are having a graduated series of holes therein for detachably aceommodatin g a pin or stop to limit the throw of said hand-lever operating in connection therewith, and thereby, adapt the attachment to different widths of lock-folds to be made in the various sheets, substantially as herein set forth.

In testimony of which invention I have hereunto set my hand.

GEORGE G. KEENE.

\Vitnesses:

JOHN ELIAS JONES, L. M. JoNEs. 

